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k in (-oo:+oo)
-4*k-(3/4) = 79/44 // - 79/44
-4*k-(3/4)-(79/44) = 0
-4*k-3/4-79/44 = 0
-4*k-28/11 = 0 // + 28/11
-4*k = 28/11 // : -4
k = 28/11/(-4)
k = -7/11
k = -7/11
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